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91 lines
2.2 KiB
91 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* interface to the SCLP-read/write driver |
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* |
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* Copyright IBM Corporation 1999, 2009 |
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* |
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* Author(s): Martin Peschke <[email protected]> |
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* Martin Schwidefsky <[email protected]> |
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*/ |
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#ifndef __SCLP_RW_H__ |
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#define __SCLP_RW_H__ |
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#include <linux/list.h> |
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struct mto { |
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u16 length; |
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u16 type; |
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u16 line_type_flags; |
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u8 alarm_control; |
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u8 _reserved[3]; |
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} __attribute__((packed)); |
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struct go { |
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u16 length; |
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u16 type; |
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u32 domid; |
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u8 hhmmss_time[8]; |
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u8 th_time[3]; |
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u8 reserved_0; |
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u8 dddyyyy_date[7]; |
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u8 _reserved_1; |
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u16 general_msg_flags; |
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u8 _reserved_2[10]; |
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u8 originating_system_name[8]; |
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u8 job_guest_name[8]; |
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} __attribute__((packed)); |
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struct mdb_header { |
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u16 length; |
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u16 type; |
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u32 tag; |
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u32 revision_code; |
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} __attribute__((packed)); |
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struct mdb { |
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struct mdb_header header; |
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struct go go; |
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struct mto mto; |
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} __attribute__((packed)); |
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struct msg_buf { |
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struct evbuf_header header; |
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struct mdb mdb; |
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} __attribute__((packed)); |
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/* The number of empty mto buffers that can be contained in a single sccb. */ |
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#define NR_EMPTY_MSG_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \ |
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sizeof(struct sccb_header)) / sizeof(struct msg_buf)) |
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/* |
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* data structure for information about list of SCCBs (only for writing), |
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* will be located at the end of a SCCBs page |
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*/ |
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struct sclp_buffer { |
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struct list_head list; /* list_head for sccb_info chain */ |
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struct sclp_req request; |
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void *sccb; |
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struct msg_buf *current_msg; |
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char *current_line; |
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int current_length; |
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int retry_count; |
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/* output format settings */ |
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unsigned short columns; |
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unsigned short htab; |
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/* statistics about this buffer */ |
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unsigned int char_sum; /* # chars in sccb */ |
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unsigned int messages; /* # messages in sccb */ |
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/* Callback that is called after reaching final status. */ |
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void (*callback)(struct sclp_buffer *, int); |
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}; |
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int sclp_rw_init(void); |
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struct sclp_buffer *sclp_make_buffer(void *, unsigned short, unsigned short); |
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void *sclp_unmake_buffer(struct sclp_buffer *); |
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int sclp_buffer_space(struct sclp_buffer *); |
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int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int); |
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int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int)); |
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unsigned int sclp_chars_in_buffer(struct sclp_buffer *); |
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#endif /* __SCLP_RW_H__ */
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